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  2. Self-leveling concrete - Wikipedia

    en.wikipedia.org/wiki/Self-leveling_concrete

    History. Self-leveling concrete was invented in 1952 by Axel Karlsson from Sweden. The first product was a combination of wood glue, fine sand and cement with additives. [1] It was called flytspackel, which directly translates to "floating putty". The term self-leveling can be traced back to a patent applied by the company Lafarge in 1997. [2]

  3. Concrete - Wikipedia

    en.wikipedia.org/wiki/Concrete

    Concrete floors were found in the royal palace of Tiryns, Greece, which dates roughly to 1400 to 1200 BC. [11] [12] Lime mortars were used in Greece, such as in Crete and Cyprus, in 800 BC. The Assyrian Jerwan Aqueduct (688 BC) made use of waterproof concrete. [13] Concrete was used for construction in many ancient structures. [14]

  4. Foam concrete - Wikipedia

    en.wikipedia.org/wiki/Foam_concrete

    Foam concrete is a versatile building material with a simple production method that is relatively inexpensive compared to autoclave aerated concrete. [1] Foam concrete compounds utilising fly ash in the slurry mix is cheaper still, and has less environmental impact. Foam concrete is produced in a variety of densities from 200 kg/m 3 to 1,600 kg ...

  5. Polished concrete - Wikipedia

    en.wikipedia.org/wiki/Polished_concrete

    Before a floor can be polished, it must have a hardness reading of 4,000 psi or higher for best results. [1] A reading below this measure means the floor is soft and can crack under pressure. The next step is the initial grinding. In this step, low grit diamonds (e.g. 16- to 20-grit) are used to grind down all uneven surface until the floor is ...

  6. Reinforced concrete - Wikipedia

    en.wikipedia.org/wiki/Reinforced_concrete

    Tensile strength (σt) Stronger than concrete. Reinforced concrete, also called ferroconcrete, is a composite material in which concrete 's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility.

  7. Types of concrete - Wikipedia

    en.wikipedia.org/wiki/Types_of_concrete

    Gypsum concrete is a building material used as a floor underlay [43] used in wood-frame and concrete construction for fire ratings, [43] sound reduction, [43] radiant heating, [44] and floor leveling. It is a mixture of gypsum, Portland cement, and sand. [43] One of its advantages is the lightweight nature.

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